Table 2.
Metal levels (ng/g=ppb dry weight) in feathers and eggs of common eider collected from Amchitka and Kiska
| Common Eider | Amchitka | Kiska | χ2 (p) |
|---|---|---|---|
| Feathers | n=22 | n=8 | |
| Arsenic | 163±23.8 | 156±30.7 | 0.0 (NS) |
| 100 | 131 | ||
| Cadmium | 28.3±5.7 | 24.8±9.46 | 0.1 (NS) |
| 4.27 | 6.14 | ||
| Chromium | 1,790±114 | 1,740±281 | 1.1 (NS) |
| 1,730 | 1,630 | ||
| Lead | 489±55.5 | 642±202 | 0.1 (NS) |
| 436 | 515 | ||
| Manganese | 13,100±2,860 | 3,370±833 | 5.0 (0.03) |
| 7,550 | 2,820 | ||
| Mercury | 886±157 | 1,240±323 | 0.3 (NS) |
| 625 | 766 | ||
| Selenium | 1,600±154 | 1,640±127 | 0.0 (NS) |
| 1,430 | 1,600 | ||
| Eggs | n=35 | n=17 | |
| Arsenic | 612±58.1 | 1,080±151 | 7.8 (0.005) |
| 517 | 750 | ||
| Cadmium | 1.44±0.49 | 1.59±0.7 | 0.2 (NS) |
| 0.09 | 0.16 | ||
| Chromium | 497±89.7 | 248±22.6 | 3.3 (0.07) |
| 346 | 233 | ||
| Lead | 332±132 | 254±143 | 0.5 (NS) |
| 79.1 | 84.8 | ||
| Manganese | 1,710±114 | 1,000±98.6 | 14.0 (0.0002) |
| 1,540 | 881 | ||
| Mercury | 413±18.9 | 466±53.6 | 0.5 (NS) |
| 400 | 403 | ||
| Selenium | 2,100±166 | 992±78.9 | 20.0 (<0.0001) |
| 1,900 | 935 |
For each metal the first row gives arithmetic mean±standard error, and the second row gives the geometric means. Comparison are with Kruskal–Wallis non-parametric analysis of variance yielding chi-square statistics and (p values)